JP4864361B2 - Weight type sorting apparatus and its sorting method - Google Patents

Description

  The present invention relates to a weight type sorting apparatus and a sorting method thereof. More particularly, the present invention relates to a weight type sorting device in which a sorting device sorts articles based on a weighing result of the weighing device and a sorting method thereof.

  In general, a weight-type sorting device that sorts items sent out by a conveyor or other transport device by weight is generally measured by a weighing device such as a weighing conveyor in which a load cell is mounted on a conveyor support. The control device compares the measured value with a selection reference value, for example, an allowable upper limit value and an allowable lower limit value, and sorts and sorts the articles by the sorting device based on the comparison result. As a sorting device, a sorting conveyor in which various devices such as a movable arm, a damper, an air jet, and a pusher are mounted on a conveyor has been put into practical use.

  Here, the weighing device measures the weight of the article while conveying the article delivered from the delivery end of the conveyance device. Therefore, in the operation of the conventional gravimetric sorting apparatus, there occurs a situation in which the weighing device weighs a plurality of articles at once, or a situation in which subsequent articles come into contact with the weighing apparatus during weighing. The unforeseen situation caused erroneous weighing of the weight-type sorting device, resulting in a drop in sorting accuracy and sorting efficiency.

For this reason, Patent Document 1 proposes a countermeasure for such a situation. That is, the apparatus of Patent Document 1 is provided with an interval detection device that detects an interval between articles in the conveyance device. If the interval between articles is less than a predetermined interval, the apparatus is conveyed with the interval. Any one of the two articles is excluded before reaching the weighing device.
Registered utility model No. 2536179.

  However, in the device of Patent Document 1, an exclusion device that excludes articles is disposed between the interval detection device and the weighing device, and the interval detection device and the weighing device are not close to each other. For this reason, the distance between the articles may change between the distance detection device and the weighing device due to some cause such as slippage of the articles on the conveyor, conflict between the guides on the conveyor edge and the articles, and the like. There is room for improvement as a countermeasure to the situation where the apparatus weighs a plurality of articles at once or the situation where subsequent articles come into contact with the weighing apparatus during weighing. In addition, when two or more articles are formed in a lump to form an article group, the interval detection device cannot detect a situation in which a plurality of articles are collectively weighed by the weighing device, and is excluded by the exclusion device. There was also a problem that they could not.

  In addition, in the operation of the conventional weight type sorting apparatus including the apparatus of Patent Document 1, a plurality of articles are mistakenly weighed together for articles distributed as articles whose measured values exceed the allowable upper limit value, that is, overweight items. The article in the case where it has been done, that is, an erroneously measured product may also be included. For this reason, it is customary for the workers of the weight type sorting apparatus to re-sort by putting the excess quantity into the weight type sorting apparatus again. This re-sorting leads to an increase in the burden and time for sorting goods. In addition, by re-sorting, the total number of items sorted by the weight sorter becomes larger than the number of items sorted by the weight sorter, so the total number of items sorted as well as the number of overweight items There was a problem that became inaccurate.

  The present invention has been made to solve the above-described problems, and eliminates the need for re-sorting of oversized items, and can accurately count the number of sorted items even if re-sorting is performed. It is an object of the present invention to provide a weight type sorting apparatus and a sorting method thereof.

  In order to solve the above-described problems, a weight-type sorting apparatus according to the present invention includes a conveying device that sequentially sends articles from a delivery end, and the article that is disposed at the delivery end and that is sent from the delivery end. A weighing device for weighing the article, a detection device for detecting the passage of the article in the vicinity of the receiving side of the weighing device, a sorting device for sorting the articles sent from the weighing device, and a control A weight-type sorting device, wherein the control device determines whether the weighing of the article is correct based on a detection result of the detection device or a weighing result of the weighing device. The sorting device is controlled to sort and sort the articles based on the weighing result. In the case of erroneous weighing, the sorting device is controlled to set the article and the group of articles including the articles as wrong weighing articles. Shake Dividing (claim 1). When configured in this way, a situation in which the weighing device weighs a plurality of articles together and a situation in which a subsequent article comes into contact with the weighing apparatus during weighing is detected, and articles and articles that are inappropriate for weighing are detected. Since the group can be sorted as an erroneously weighed product, it is possible to eliminate the necessity of the re-sorting operation for the oversized product and to accurately count the number of the sorted product even if the re-sorting operation is performed. Here, “in the vicinity of the receiving side” includes a position on the receiving side on the conveying path of the weighing device, a position between the conveying device and the weighing device, or a position on the sending side on the conveying path of the conveying device.

  In order to obtain the effect of the present invention more reliably, the control device is configured to detect when a subsequent article is detected by the detection device within a predetermined time after an article to be sorted is detected by the detection device, or If the weighing result of the item to be sorted is equal to or greater than a predetermined weight, it may be determined that the weighing is incorrect.

  Here, the “predetermined time” is a time required to prevent a situation in which the weighing device weighs a plurality of articles at a time, or a situation in which a subsequent article contacts the weighing apparatus during weighing. It is. For example, the “predetermined time” can be a time required for the weighing device to weigh the article. The “predetermined weight” is a weight that can detect a situation in which the weighing device weighs a plurality of articles collectively. For example, the “predetermined weight” can be a double value of the selection reference value. Alternatively, in the case of sorting into three categories of underweight, appropriate quantity, and overweight using the allowable upper limit value and the allowable lower limit value as selection reference values, the “predetermined weight” may be twice the allowable lower limit value. it can. “A group of articles including the article” refers to a group of a plurality of articles that the detection device erroneously detects as one article.

  The control device is configured to detect when a subsequent article is detected by the detection apparatus after the article to be sorted is detected by the detection apparatus and before the measurement result of the article to be sorted is determined, or If the weighing result of the article is equal to or greater than a predetermined weight, it may be determined that the weighing is incorrect (Claim 3). If comprised in this way, while the effect of this invention can be acquired more reliably and it is not necessary to measure the time after the articles | goods to be selected are detected by the detection apparatus, a weight type | mold sorting apparatus is simplified. be able to.

  In order to obtain the effect of the present invention more reliably, the control device may store and output the number of times that the control device has determined the erroneous weighing as the number of erroneous weighings (claim 4).

  The control device stores and outputs the number of selected items and the number of erroneous weighings for each distribution destination of the article, and when re-sorting the erroneously measured products, the control device The number of re-sorted items may be added to the number of sorted items, and the number of times of erroneous weighing may be updated to the number of times of wrong weighing in re-sorting, stored, and output. If comprised in this way, while being able to acquire the effect of this invention more reliably, the number of sorting goods when the user of a weight type sorter performs resorting can be acquired more easily.

  The sorting method of the weight type sorting apparatus according to the present invention includes a transport device that sequentially feeds articles from a delivery end, and the article disposed at the delivery end and transporting the articles sent from the delivery end. A gravimetric sorting device having a weighing device for weighing, a detection device for detecting the passage of the article in the vicinity of the receiving side of the weighing device, and a sorting device for sorting the articles sent from the weighing device And determining whether the article is weighed correctly based on the detection result of the detection device or the weighing result of the weighing device, and in the case of proper weighing, the sorting device is used to select the article. A step of sorting and sorting based on the weighing result; and a step of sorting the article and a group of articles including the article as an erroneously measured product by the sorting device in the case of erroneous weighing. Bets, has (claim 6). When configured in this way, a situation in which the weighing device weighs a plurality of articles together and a situation in which a subsequent article comes into contact with the weighing apparatus during weighing is detected, and articles and articles that are inappropriate for weighing are detected. Since the group can be sorted as an erroneously weighed product, it is possible to eliminate the necessity of the re-sorting operation for the oversized product and to accurately count the number of the sorted product even if the re-sorting operation is performed.

  As described above, according to the weight type sorting apparatus and the sorting method of the present invention, it is possible to eliminate the necessity of the re-sorting operation of the oversized items and to accurately count the number of sorted items even if the re-sorting operation is performed. it can.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a block diagram schematically showing a configuration of a weight type sorting apparatus according to an embodiment of the present invention.

  In FIG. 1, the weight type sorting device 100 is configured to include a transport device 1, a weighing device 2, a sorting device 3, a detection device 4, and a control device 5. Then, the article P is transported from the transport device 1 and transported in the order of the weighing device 2 and the distribution device 3, and is distributed to the distribution destinations B1 to B5 by the distribution device 3.

  Here, the conveying apparatus 1 is configured to sequentially deliver the articles P from the sending end 1A using a conveying conveyor.

  The weighing device 2 is disposed at the delivery end 1A of the transport device 1, and weighs the weight of the article P while transporting the article P sent from the delivery end 1A. Here, a weighing conveyor is used in which a load cell is mounted on the support of the conveyor.

  The sorting device 3 is disposed at the sending end 2A of the weighing device 2, and sorts the articles P sent from the sending end 2A into a plurality of sorting destinations. Here, two sorting conveyors 3A and 3B arranged in series are used, and the article P can be sorted into five sorting destinations B1 to B5. On the sorting conveyors 3A and 3B, a movable arm 3C is mounted so as to advance and exit on the conveyor and allow articles on the conveyor to exit to the side of the conveyor. In addition, you may use the sorting conveyor with which various apparatuses, such as a damper, an air jet, and a pusher, were mounted | worn.

  The detection device 4 is arranged to detect the passage of the article P in the vicinity of the receiving side of the weighing device 2. Here, a photoelectric switch is arranged so that the light beam traverses the sending end 1A in the horizontal direction, more specifically, in the direction perpendicular to the conveying direction of the article P in the extending surface of the belt conveyor. The passage of the article P is detected by detecting the blockage. The “near the receiving side of the weighing device 2” includes the position on the receiving side of the weighing device 2 on the conveying path, between the conveying device 1 and the weighing device 2, or on the sending side of the sending device 1 on the conveying path. That is, as shown in FIG. 1, in addition to between the conveying device 1 and the weighing device 2, the measuring line X on the sending device 1 in the vicinity of the sending end 1 </ b> A may be used, or near the receiving side of the weighing device 2. The measurement line Y may be used. In addition, the photoelectric switch can be arranged so that the light beam vertically cuts in the vertical direction.

  The control device 5 determines the correctness of the weighing of the article P based on the detection result of the detection device 4 or the weighing result of the weighing device 2, and in the case of proper weighing, controls the sorting device 3 to weigh the article P. Sort and sort based on the results. For example, if the measurement result is within the proper amount range, the product is assigned as an appropriate amount product. Sort out. Further, in the case of erroneous weighing, the sorting device 3 is controlled to sort the article P and the article group PP including the article P as an erroneously measured product.

  Here, the article group PP refers to a group of a plurality of articles P that the detection device 4 erroneously detects as one article. For example, as illustrated in FIG. 1, the articles P overlap each other. Or the state where the articles | goods P are paralleling.

  In the present embodiment, the control device 5 calculates an interval between the article P and the subsequent article P based on the detection signal of the detection device 4, and an interval of the article P based on the detection signal of the weighing device 2. Sorting to determine the distribution destinations B1 to B5 of the articles P based on the calculation results of the weight calculation unit 5B, the interval calculation unit 5A and the weight calculation unit 5B for calculating the weight, and the determination criteria stored in the determination criterion storage unit 5D in advance. Based on the determination result of the determination unit 5C, the distribution determination unit 5C, the control unit 5E that controls the operation of the distribution device 3, the count unit 5F that counts the determination result of the distribution determination unit 5C, and the output that outputs the count result of the count unit 5F 5G, and an input unit 5H for inputting and setting determination criteria and count criteria to the determination criterion storage unit 5D and the count unit 5F.

  Here, the determination criterion is a selection criterion value corresponding to the measurement value. For example, an allowable lower limit value and an allowable upper limit value that define an appropriate amount range of the article P are input from the input unit 5H and stored in the determination criterion storage unit 5D. Alternatively, the reference weight value and the allowable width of the article P are input from the input unit 5H and stored in the determination reference storage unit 5D, and the distribution determination unit 5C automatically adds or subtracts the allowable width to the reference weight value and sets the allowable lower limit value and An allowable upper limit value may be calculated and used for the allocation determination.

The count reference is an initial value of the _{first to} fifth distribution destinations B _{1 to} B ₅ . For example, whether the previous count number is stored as an initial value and accumulated to be counted, or the count values of all the distribution destinations B1 to B5 are reset to 0 without being accumulated, and counting is started. The data is selected and input by the input unit 5H and stored in the count unit 5F.

  The interval calculation unit 5A, the weight calculation unit 5B, the distribution determination unit 5C, the control unit 5E, and the count unit 5F are configured by a general calculation device such as a CPU, and their functions are realized by appropriate software.

  The criterion storage unit 5D is configured by a general storage device such as a memory.

  The input unit 5H includes a general input device such as a touch panel and a keyboard.

  The output unit 5G includes a general output device such as a display and a printer.

  The control device means not only a single control device but also a control device group in which a plurality of control devices cooperate to execute control. Therefore, the control device 5 does not need to be composed of a single control device, and a plurality of control devices are distributed and configured to control the operation of the weight type sorting device 100 in cooperation with each other. You can also. For example, the count unit 5F may include a communication terminal, the output unit 5G may be a mobile device, and the count result may be transmitted from the count unit 5F to the output unit 5G. Further, the interval calculation unit 5A may be configured to be incorporated in the detection device 4. The weight calculation unit 5B can also be configured to be incorporated in the weighing device 2. The control unit 5E can also be configured to be incorporated in the distribution device 3.

  Next, the sorting operation of the weight type sorting apparatus 100 of the present invention will be described.

  FIG. 2 is a flowchart showing the sorting operation of the weight type sorting apparatus of FIG. This sorting operation is performed under the control of the control device 5. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

  When the sorting operation starts, first, in step S1, it is determined whether or not the determination criterion and the counting criterion for the article P are input from the input unit 5H. The control device 5 waits until the determination criterion and the count criterion are input (“NO” in step S1 of FIG. 2), and when these are input, the process proceeds to step S2 (“YES” in step S1 of FIG. 2). ).

Here, an allowable lower limit value M ₁ and an allowable upper limit value M ₂ that define an appropriate amount range of the article P are input as determination criteria. The count reference is input so that the distribution numbers N _{1 to} N ₅ of the distribution destinations B1 to B5 are zero. If the input unit 5H is configured with a touch panel and “No” is selected and input for the touch panel display “cumulative count to previous count result?” Or “re-sort?”, N automatically _{1 to} N ₅ may be input as 0.

  Next, in step S <b> 2, the apparatus of the transport apparatus 1 isometric sorter 100 is activated, and the article P is transported by the transport apparatus 1. The article P is placed on the transport device 1 and transferred to the weighing device 2 at the delivery end 1A.

  In step S3, the detection device 4 detects the passage of the article P. The detection device 4 detects the passage of the article P and transmits a detection signal to the interval calculation unit 5A. Further, the weighing device 2 measures the weight of the article P and transmits a weighing signal to the weight calculation unit 5B.

  In step S4, the interval calculation unit 5A calculates the interval T with the subsequent article P based on the detection signal of the detection device 4, and the weight calculation unit 5B calculates the weight M of the item P based on the detection signal of the weighing device 2. Calculate. After the detection in step S3, the interval calculation unit 5A calculates the time until the subsequent article P is detected by the detection device 4, or calculates the distance between the articles P from the calculated time, and the distribution determination unit 5C. Send to. The weight calculation unit 5B transmits the weight M of the article P to the distribution determination unit 5C. Note that the last article P of the sorting operation cannot be calculated by the interval calculation unit 5A because there is no subsequent article P, but the interval calculation unit 5A uses T as ∞ (maximum measurement limit value) and the distribution determination unit. Send to 5C.

In step S5, the controller 5, the allocation determination unit 5C in more detail, the distance T between the determination interval (the predetermined time) is compared with T _0. The determination interval T ₀ is set in advance in the distribution determination unit 5C. Here, the interval T and the determination interval T ₀ are the time between detection signals of the detection device 4, but may be a distance calculated from the time between detection signals. The determination interval T ₀ is a time or distance necessary to prevent a situation in which the weighing device weighs a plurality of articles, or a situation in which a subsequent article contacts the weighing apparatus during weighing. is there. In the present embodiment, it is a standard time required for the weighing device 2 to weigh the article P. Alternatively, the time required for the article P to pass through the weighing device 2 or the transport distance of the weighing device 2 can be used.

In step S5, if the T ≦ T _0, the process proceeds to step S8, the control unit 5, the allocation determination unit 5C, and the control unit 5E is more particularly, distributed to the first distribution destination B ₁ as weighing products erroneous article P . As a result, the weight type sorting apparatus 100 detects the subsequent article P by the detection apparatus 4 within a predetermined time after the detection by the detection apparatus 4, that is, the time required for the weighing apparatus 4 to measure the article P. In this case, it is possible to determine that the weighing of the article P is inappropriate, and to sort the articles P as erroneous weighing products. That is, the weight-type sorting device 100 and the sorting method thereof measure the article P by detecting a situation in which the distance between the articles P is short and the subsequent article P contacts the weighing device 2 during the weighing operation of the article P. Can be classified and sorted as an erroneously measured product. In step S9, the control device 5, more specifically, the count unit 5F, counts up the count number (number of erroneous weighing) N ₁ of the first distribution destination as N ₁ +1.

On the other hand, if T ≧ T ₀ in step S5, the process proceeds to step S6, and the control device 5, more specifically, the distribution determination unit 5C compares the weight M with the allowable lower limit value M ₁ and the allowable upper limit value M _2. .

In step S6, if the M <M _1, the process proceeds to step S14, the control unit 5, the allocation determination unit 5C, and the control unit 5E is more sorts the fourth distribution destination B ₄ articles P as underweight products . In step S15, the control device 5, more specifically, the counting unit 5F, counts up the count number (selected product number) N ₄ of the fourth distribution destination as N ₄ +1.

In the case of M ₁ ≦ M ≦ M ₂ , the process proceeds to step S12, and the control device 5, more specifically, the distribution determination unit 5C and the control unit 5E distribute the article P to the fifth distribution destination B ₅ as an appropriate amount product. . In step S13, the control device 5, more specifically, the count unit 5F, counts up the fifth distribution destination count number (selected product number) N ₅ to N ₅ +1.

Further, when M> M ₂ , the process proceeds to step S7, and the control device 5, more specifically, the distribution determination unit 5C compares the weight M with a multiple 2M ₁ of the allowable lower limit value M ₁ .

In step S7, if the M ≧ 2M _1, the process proceeds to step S8, the control unit 5, the allocation determination unit 5C, and the control unit 5E is more particularly, the as weighing products erroneous group of articles PP containing articles P or article P distributed to 1 of the distribution destination B _1. Thus, if there is more than double the weight of the allowable lower limit value M ₁ is determined to inappropriate metering of articles P, it can be distributed as a metering products erroneous group of articles PP containing articles P or article P. In other words, the weight type sorting apparatus 100 detects the situation where the weighing device 2 weighs a plurality of articles P together, determines that the weighing of the articles P is inappropriate, and selects the article group PP including the articles P and the articles P. Can be sorted as an incorrect weighing product. In step S9, the control device 5, more specifically, the count unit 5F, counts up the count number N ₁ of the first distribution destination as N ₁ +1.

Further, in step S7, if the M <2M _1, the process proceeds to step S11, the control unit 5, more sorting determination unit 5C, and the control unit 5E in detail, the third distribution destination B ₃ articles P as overdose products Distribute. As a result, only articles P in the range of M ₁ <M <2M ₁ are distributed as overweight items. In step S11, the control device 5, more specifically the count unit 5F, counts up the count number (number of selected items) N ₃ of the third distribution destination as N ₃ +1.

  After step S9, step S11, step S13 or step S15, in step S16, the control device 5 determines whether or not there is a subsequent article P, and if there is a subsequent article P, repeats step S3 and subsequent steps. The subsequent article P is selected. Here, the presence / absence of the subsequent article P is determined based on the detection signal of the detection device 2, but may be determined based on information from an external transfer device, a manufacturing device, or the like.

  If there is no subsequent article P in step S16, the process proceeds to step S17 and the sorting operation is stopped.

  In step S18, the presence / absence of a re-sorting operation is confirmed. That is, it is confirmed whether or not the erroneously weighed product is transported again to the transport device 1 and re-sorted. The confirmation of the re-sorting operation is performed by an operator inputting to the input unit 5H of the control device 5. For example, when the input unit 5H is configured with a touch panel and the rescreening is performed on the touch panel display “cumulative count to the previous count result?” Or “rescreening?”, “Yes” When re-sorting is not performed, “No” may be selected and input.

When performing the re-sorting, the process proceeds to step S19, the control unit 5, the count unit 5F and more particularly, a count number N ₁ of the first sorting destination is reset to 0, step S2 and subsequent operations is repeated . As a result, the count number (number of erroneous weighing) N ₁ of the first distribution destination is recounted from 0, but the count numbers (number of selected items) N _{3 to} N ₅ of the _{third to} fifth distribution destinations are cumulative counts. Therefore, the user of the weight type sorting apparatus can more easily obtain the number of sorted items N _{3 to} N ₅ when re-sorting is performed.

  If re-sorting is not performed, the sorting operation is terminated.

[Modification 1]
Here, a modified example of the sorting operation of the weight type sorting apparatus 100 of the present invention will be described.

  FIG. 3 is a part of a flowchart showing a modification of the flowchart of FIG. The selection operation of this modification is a modification of steps S4 and S5 in FIG. Therefore, since steps S1 to S3 and steps S6 to S19 are the same as those in FIG. 2, only the steps shown in FIG. 3 will be described. 3, the same steps as those shown in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 2, after the detection device 4 detects the passage of the article P in step S3, in step S40, the weighing device 2 and the weight calculator 5B determine the weight of the article P based on the detection signal in step S3. Start weighing M.

  In steps S50A and S50B, the correctness / incorrectness of the weighing of the article P is determined based on whether or not the subsequent article P is detected by the detection device 4 during the weighing M weighing operation.

  Specifically, in step S50A, the control device 5, more specifically the distribution determination unit 5C, confirms whether or not the subsequent article P is detected by the detection device 4.

If there is a subsequent detection of the article P, it is determined that there is an erroneous weighing. That is, the process proceeds to step S8, as shown in FIG. 2, the control device 5 distributes the first assignment destination B ₁ as weighing products erroneous article P.

  If the subsequent article P is not detected, the process proceeds to step S50B, and the sorting determination unit 5C confirms the completion of the weighing M weighing operation, that is, the confirmation of the weight M.

When the weight M is determined, the process proceeds to step S6, and the control device 5 compares the weight M with the allowable lower limit value M ₁ and the allowable upper limit value M ₂ as shown in FIG.

  When the weight M is not fixed, the process returns to step S50A, and the sorting determination unit 5C repeats the confirmation of whether or not the subsequent article P is detected by the detection device 4.

According to this modification, the weight-type sorting device 100 detects the sorting result after the weighing device 4 determines the weighing result of the sorting target item P, that is, the weight M after the sorting target item P is detected by the detection device 4. If the subsequent article P is detected by the device 4, it is determined that the weighing is incorrect. Accordingly, the present modified example, the control unit 5, arithmetic (measurement) of the interval T between the subsequent article P in the interval calculation unit 5A more, and it eliminates the need for setting the judgment interval T ₀ in the determination unit 5C Can do. That is, the configuration of the weight type sorting apparatus 100 and the sorting method can be further simplified.

As described above, in the weight sorting apparatus 100 according to the present invention, the weighing device 2 weighs a plurality of articles P together, and the subsequent article P contacts the weighing device 2 during weighing. Since it is possible to detect the situation and to sort the articles P and group PP that are inappropriately weighed as erroneously weighed products, it eliminates the need for reweighing of overweight items and is accurate even if re-sorting operations are performed. The number of selected items N _{3 to} N ₅ can be counted.

Although not shown, the conveying device 1, metal detection device is seated, the controller 5 based on the detection signal of the metal detector device, sorting the article into the second distribution destination B _2, the 2 assignment destination of the count number (selection number of articles) N ₂ may be configured to count up the N ₂ +1. In this way, other sorting functions can be added to the weight sorting apparatus.

  The weight type sorting apparatus of the present invention eliminates the need for re-sorting of overweight items, and uses a weight type sorting apparatus and its sorting method that can accurately count sorting results even if re-sorting work is performed. Useful.

It is a block diagram showing roughly the composition of the weight type sorter of an embodiment of the invention. It is a flowchart which shows the selection operation | movement of the weight type selection apparatus of FIG. It is a part of flowchart which shows the modification of the flowchart of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance apparatus 1A Sending end 2 Weighing device 2A Sending end 3 Sorting device 3A, 3B Sorting conveyor 3C Movable arm 4 Detection device 5 Control device 5A Interval calculation unit 5B Weight calculation unit 5C Sorting determination unit 5D Determination reference calculation unit 5F Count unit 5G output unit 5H input unit 100 by weight-based separation device B ₁ .about.B ₅ first to fifth sorting destination M weight M ₁ allowable lower limit value M ₂ allowable upper limit P article PP goods group T distance T ₀ determined distance X, Y Measuring line

Claims (5)

A transport device for sequentially sending articles from a delivery end;
A weighing device disposed at the delivery end for weighing the article while transporting the article delivered from the delivery end;
A detection device for detecting the passage of the article in the vicinity of the receiving side of the weighing device;
A sorting device for sorting the articles sent from the weighing device;
Possess a control device, the,
The control device determines whether the weighing of the article is correct based on the detection result of the detection device or the weighing result of the weighing device, and in the case of proper weighing, controls the sorting device to control the weighing of the article. In the weight-type sorting device that sorts and sorts based on the result, and in the case of incorrect weighing, controls the sorting device and sorts the article and the group of articles including the article as an incorrectly weighed item .
The control device measures the subsequent article during the weighing operation of the selection target article when the detection article detects the subsequent article within a predetermined time after the selection target article is detected by the detection apparatus. It is determined that the measurement is incorrect due to contact with the device.
A case in which a subsequent article is detected by the detection apparatus after a predetermined time has elapsed after the article to be sorted is detected by the detection device, and the weighing result of the article to be sorted is A gravimetric sorting device that determines that a plurality of articles overlap each other, or is erroneously weighed while being conveyed in parallel when the allowable lower limit value of the range of proper weighing is twice or more . A transport device for sequentially sending articles from a delivery end;
A weighing device disposed at the delivery end for weighing the article while transporting the article delivered from the delivery end;
A detection device for detecting the passage of the article in the vicinity of the receiving side of the weighing device;
A sorting device for sorting the articles sent from the weighing device;
A control device ,
The control device determines whether the weighing of the article is correct based on the detection result of the detection device or the weighing result of the weighing device, and in the case of proper weighing, controls the sorting device to control the weighing of the article. In the weight-type sorting device that sorts and sorts based on the result, and in the case of incorrect weighing, controls the sorting device and sorts the article and the group of articles including the article as an incorrectly weighed item.
The control device, when the article to be sorted is detected by the detection device and the succeeding article is detected by the detection device before the weighing result of the article to be sorted is determined, It is determined as an incorrect weighing that is measured when a subsequent article comes into contact with the weighing device during the weighing operation.
Even when the article sorting target subsequent article is detected by the detection device after a lapse of a predetermined time or more after being detected by the detection device and the weighing result of該選another object of the article of the article when more than twice the allowable lower limit of the range of proper measurement, a plurality of articles overlapping state or weight-based separation device you determined has been erroneously weighed weighing while being conveyed in parallel.   The weight type sorting apparatus according to claim 1, wherein the control device stores and outputs the number of times of determination as the erroneous weighing as the number of erroneous weighings. The control device stores and outputs the number of selected items and the number of erroneous weighing for each distribution destination of the article,
In the case of re-sorting the erroneously weighed product, the control device adds the number of re-sorted items for each sorting destination in the re-sorting to the number of sorted items, and further updates the number of times of erroneous weighing to the number of erroneous weighing in the re-sorting. The weight-type sorting device according to claim 1, wherein the weight-type sorting device stores and outputs the weight. A transport device for sequentially sending articles from a delivery end;
A weighing device disposed at the delivery end for weighing the article while transporting the article delivered from the delivery end;
A detection device for detecting the passage of the article in the vicinity of the receiving side of the weighing device;
A sorting method of a weight type sorting device having a sorting device for sorting the articles sent from the weighing device,
Determining the correctness of the weighing of the article based on the detection result of the detection device or the weighing result of the weighing device;
In the case of proper weighing, a step of sorting and sorting the article based on the weighing result by the sorting device;
When a subsequent article is detected by the detection device within a predetermined time after the article to be sorted is detected by the detection device, the subsequent article contacts the weighing device during the weighing operation of the article to be sorted. A case where a subsequent article is detected by the detection device after a predetermined time has elapsed after the article to be selected is detected by the detection device, and When the weighing result of the item to be sorted is more than twice the allowable lower limit value of the proper weighing range of the item, an error is measured when a plurality of items are overlapped or conveyed in parallel. Determining to weigh;
A sorting method for a weight type sorting apparatus, comprising: a step of sorting the article and a group of articles including the article as a wrong weighing product when the sorting apparatus determines that the weighing is wrong .

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